Purpurite and Ettringite Physical Properties

Purpurite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.41.77

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

Not Available

1.6 Cleavage

[100] [001] perfect

Perfect on {10 1 0}

1.7 Mohs Hardness

4-4.52-2.5

2 10

1.8 Chemical Composition

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Purpurite and Ettringite Chemical Formula

While comparing Purpurite and Ettringite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Purpurite and Ettringite chemical formula.

Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Violet Gemstones

Purpurite Vs Sardonyx

Purpurite Vs Sard

Purpurite Vs Sapphire

Purpurite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Purpurite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 1.77 whereas that of Ettringite is 1.77.